A brake drum septum spot welding device

Abstract

The application discloses a brake drum diaphragm spot welding device and belongs to the field of welding, which comprises a shell, and mounting plates are fixedly connected to the upper and lower ends of the front side of the shell. The end point of the second copper column is in the same plane as the end point of the first copper column, then the second copper column and the first copper column in the same plane are contacted with the to-be-welded brake drum diaphragm with relatively thick thickness or good heat conduction capacity, a larger-diameter electrode is used on the thick plate or the side with good heat conduction capacity, so that the contact area is increased, the current density is reduced, and the heat generation is reduced; a smaller-diameter electrode is used on the thin plate or the side with poor heat conduction capacity, so that the current is concentrated, the heat generation is increased, and the heat distribution is achieved, and the purpose is to make more heat flow to the thick plate, and the thin plate is protected from overheating, so that the phenomenon that when the thickness difference between the two plates is large, heat is mainly concentrated on the thick plate, and the thin plate is possibly burnt through or the thick plate is not fused is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of welding, more particularly, to a brake drum diaphragm spot welding device. BACKGROUND

[0002] The brake drum is part of the drum brake system, when braking, the piston exerts pressure on the two pairs of half-moon-shaped brake shoes, making them adhere to the inner wall of the drum chamber, thereby generating friction to stop the rotation of the wheel, and in the manufacture of brake drums, a spot welding machine is needed to weld the brake drum and the diaphragm together

[0003] The spot welding machine uses the principle of double-sided double-point overcurrent welding. When working, two electrodes press the workpiece to form a certain contact resistance under the pressure of the two electrodes. When the welding current flows from one electrode to the other electrode, it forms a momentary hot fusion at the two contact resistance points. The welding current forms a loop from the other electrode to the electrode along the two workpieces, without damaging the internal structure of the welded workpiece. The welding machine uses the high-temperature arc generated by the positive and negative electrodes during the momentary short circuit to melt the welding material on the welding electrode and the welded material to achieve their combination.

[0004] The Chinese patent with the granted publication number CN112846433B discloses a spot welding machine that can obtain accurate temperature data through temperature measurement by infrared temperature measurement, thereby more accurately determining whether the welding point has reached the welding temperature, greatly reducing errors and improving welding effect.

[0005] The Chinese patent with the granted publication number CN109894700B discloses an online spot welding machine that can adjust the orientation of the welding point and the welding tool by rotating the circuit board driven by the conveying mechanism through the setting of the connection mechanism and the rotating mechanism in the circuit board conveying system, thereby avoiding the structural complexity of the welding system.

[0006] The first method above can obtain accurate temperature data through temperature measurement, greatly reducing errors and improving welding effect. The second method adjusts the orientation of the welding point and the welding tool by rotating the circuit board driven by the conveying mechanism, thereby avoiding the structural complexity of the welding system. However, when the thickness difference between the two plates is large, the heat will mainly concentrate on the thick plate, causing the thin plate to be possibly burned through or the thick plate to be not fused. SUMMARY

[0007] In view of the problems in the prior art, the purpose of the present application is to provide a brake drum separator spot welding device, by the end point of one of the second copper columns being in the same plane as the end point of the first copper column, then contacting the second copper column and the first copper column in the same plane with the to-be-welded brake drum separator which has a relatively thick thickness or a relatively good heat conduction capacity, using an electrode with a larger end face diameter on the side of the thick plate or the good heat conduction capacity to increase the contact area, reduce the current density and reduce the heat generation; using an electrode with a smaller end face diameter on the side of the thin plate or the poor heat conduction capacity to concentrate the current, increase the heat generation and achieve heat distribution, the purpose is to make more heat flow to the thick plate, while protecting the thin plate from overheating, effectively avoiding the phenomenon that when the thickness difference between the two plates is large, the heat is mainly concentrated on the thick plate, resulting in the thin plate being possibly burned through or the thick plate not being fused.

[0008] To solve the above problems, the application adopts the following technical scheme.

[0009] A brake drum separator spot welding device, comprising a shell, the front side of the shell is fixedly connected with mounting plates at the upper and lower ends, and an adjusting mechanism is arranged in the mounting plate;

[0010] The adjusting mechanism comprises a first copper column fixedly connected with the mounting plate, and a second copper column is slidably connected in the first copper column;

[0011] The top of the second copper column is fixedly connected with a rotating block, the top of the first copper column extends in the direction of the rotating block to form a second extension block, the second extension block is clamped into the interior of the rotating block, and a groove is formed in the interior of the rotating block;

[0012] The bottom outer ring of the rotating block is fixedly connected with a limiting disc, a fourth spring is arranged between the limiting disc and the first copper column and is welded with the limiting disc, the fourth spring is in a natural stretching state when the limiting disc does not move, the distance from the end point of the first copper column to the mounting plate is smaller than the distance from the end point of the second copper column to the mounting plate when the fourth spring is in the natural stretching state, and the end points of the first copper column and the second copper column are in the same horizontal plane when the fourth spring is in a tight state;

[0013] Cleaning mechanisms are arranged on the opposite sides of the two mounting plates, the cleaning mechanism comprises a driving ring fixedly connected with the mounting plate, and a limiting column is fixedly connected in the interior of the driving ring;

[0014] A limiting plate is screwingly connected to the surface of the side of the limiting column away from the driving ring, a rotating plate is rotatably connected to the outer surface of the limiting plate, and a polishing block is fixedly connected to the bottom of the rotating plate;

[0015] The first spring is welded between the driving ring and the limiting plate, the first spring is in a natural stretching state when the limiting plate does not move, and the rotating plate is fixedly connected with a plurality of steel wires in the inside;

[0016] The top middle of the limiting plate extends to form a first extension block, the top of the first extension block extends upward to form a pressing block, and the bottom of the driving ring is provided with a pressing groove corresponding to the position of the pressing block.

[0017] Further, the inner surface of the rotating plate is provided with a cleaning piece, the cleaning piece comprises a gas storage column fixedly connected with the rotating plate, and the inside of the gas storage column is slidably connected with a pressing column.

[0018] Further, the inside bottom of the pressing column is fixedly connected with a first disc, the top of the first disc is welded with a second spring, and the inside of the first disc is slidably connected with a connecting rod.

[0019] Further, the bottom of the connecting rod is fixedly connected with a second disc, the top of the second disc is fixedly connected with a plurality of barrier columns arranged in an annular array, the barrier columns penetrate through the first disc, and the surface of the connecting rod is sleeved with a third spring.

[0020] Compared with the prior art, the beneficial effects of the present application are:

[0021] 1、The end point of the second copper column and the end point of the first copper column are in the same plane, then the second copper column and the first copper column in the same plane are in contact with the to-be-welded brake drum partition plate which has a relatively thick thickness or a relatively good heat conduction capacity, a larger-diameter electrode is used on the side of the thick plate or the side with good heat conduction capacity, so as to increase the contact area, reduce the current density, and reduce the heat generation; a smaller-diameter electrode is used on the side of the thin plate or the side with poor heat conduction capacity, so as to concentrate the current, increase the heat generation, and achieve heat distribution, the purpose is to make more heat flow to the thick plate, and at the same time, the thin plate is protected from overheating, thereby effectively avoiding the phenomenon that when the thickness difference between the two plates is large, heat is mainly concentrated on the thick plate, and the thin plate is possibly burned through or the thick plate is not fused.

[0022] 2、The rotating block is rotated, the rotating block rotates with the limiting disc and the fourth spring, the fourth spring does not affect the rotation of the rotating block, the rotating block after rotation returns to the original position under the action of the fourth spring, the second extension block abuts against the groove, the retraction of the first copper column is blocked, at this time, the rotating block and the first copper column are fixed, the first copper column and the second copper column are kept in this state, the end points of the first copper column and the second copper column are in the same horizontal plane, the second copper column is moved to be in the same horizontal plane with the end point of the first copper column, the device is more convenient to use, and the first copper column and the second copper column of the upper part or the first copper column and the second copper column of the lower part can be adjusted according to needs, so that welding between welding pieces of different weights is more convenient and labor-saving.

[0023] 3、The limiting plate rotates to rotate the rotating plate, the bottom of the rotating plate is fixedly connected with the polishing block, the polishing block contacts the welding point of the welding piece at this time, and the rotating polishing block can polish the welding point of the welding piece, the oil stains, rust marks, paint or plating layer on the surface of the welding piece will seriously affect the contact resistance, resulting in unstable welding quality, and even splashing, false welding, the polishing block is used for polishing and cleaning the welding point of the welding piece, the oil stains, rust marks, paint or plating layer on the surface of the welding piece is removed, the welding effect is better, and the polishing position of the polishing block is the welding point, and the polishing is more accurate.

[0024] 4、The rotating plate rotates, the rotating plate rotates with the steel wire, the steel wire rotates more conveniently, and when the rotating plate rotates with the steel wire upwards, the rotating steel wire polishes the end points of the first copper column and the second copper column, the first copper column and the second copper column are gradually deformed, worn and alloyed under the repeated action of high temperature and high pressure, the first copper column and the second copper column are polished by the steel wire at the end points of the first copper column and the second copper column, the deformation, wear and alloying of the first copper column and the second copper column are effectively prevented, the first copper column and the second copper column do not need to be frequently disassembled and polished, and the first copper column and the second copper column can be polished each time, so that the device is more convenient to use.

[0025] 5、The polishing block and the rotating plate are connected through the rotating shaft and the torsional spring to form a reset mechanism, so that the polishing block is more closely attached to the surface of the welding piece, after the extrusion block moves upwards to the inside of the extrusion groove, the extrusion block moves with the rotating plate, the rotating plate moves with the polishing block, the polishing block moves away from the welding point, and the polishing block is rotatably connected with the rotating plate, so that the influence of the polishing block on the lifting of the rotating plate is effectively prevented, after the rotating plate is lifted, the brake drum partition plate polished by the steel wire on the first copper column and the second copper column moves away from the inside of the rotating plate, the brake drum partition plate polished by the steel wire on the first copper column and the second copper column is cleaned more conveniently, so that the device is more convenient to use, at this time, the mounting plate with the first copper column and the second copper column can contact the welding point of the welding piece, so that the device is more convenient to use, and when not in use, the rotating plate blocks the first copper column and the second copper column from the outside, and the protection effect of the first copper column and the second copper column is better.

[0026] 6、The scheme passes through the gas between the extrusion column and the first disc, and the gas reaches the bottom of the gas storage column after passing through the first disc, the gas leaves from the bottom of the gas storage column, the blocking column leaves from the inside of the first disc at the same time as the rotation of the rotating plate, which facilitates the blowing of the gas in the gas storage column to the polishing position of the polishing block, blows the material polished by the polishing block and the material in the rotating plate away from the polishing point, and the rotating plate is lifted with the cleaning piece, so that the gas is blown to the polishing edge, and the cleaning effect of the polished material is better, the surface of the connecting rod is sleeved with a third spring, and in the moving process of the connecting rod, the connecting rod extrudes the third spring, so that the third spring is deformed, the connecting rod is conveniently returned to the original position under the action of the third spring, the device can be repeatedly used, and the device is more convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic view of the spot welding device of the application;

[0028] Figure 2 It is a structural schematic view of the cleaning mechanism of the application;

[0029] Figure 3 It is a structural schematic view of the cleaning mechanism of the application;

[0030] Figure 4 It is a structural schematic view of the rotating plate of the application;

[0031] Figure 5 It is a structural schematic view of the driving ring of the application;

[0032] Figure 6 It is a structural schematic view of the cleaning piece of the application;

[0033] Figure 7 It is a structural schematic view of the connecting rod of the application;

[0034] Figure 8 It is a structural schematic view of the adjusting mechanism of the application;

[0035] Figure 9 It is a connection diagram of the adjusting mechanism and the cleaning mechanism of the application.

[0036] Explanation of reference numerals in the drawings:

[0037] 1, shell; 11, mounting plate; 2, cleaning mechanism; 21, rotating plate; 211, first extension block; 212, extrusion block; 22, limiting plate; 23, limiting column; 24, first spring; 25, drive ring; 251, extrusion groove; 26, polishing block; 27, cleaning piece; 271, extrusion column; 272, gas storage column; 273, second spring; 274, first disc; 275, connecting rod; 276, second disc; 277, blocking column; 278, third spring; 28, steel wire; 3, adjusting mechanism; 31, first copper column; 311, second extension block; 32, second copper column; 33, rotating block; 331, groove; 34, fourth spring; 35, limiting disc. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] Please refer to Figures 1 to 9 , a brake drum partition spot welding device, comprising a shell 1, the front side of the shell 1 is fixedly connected with mounting plates 11 at the upper and lower ends, the inside of the mounting plate 11 is provided with an adjusting mechanism 3, the adjusting mechanism 3 comprises a first copper column 31 fixedly connected with the mounting plate 11, the inside of the first copper column 31 is slidably connected with a second copper column 32, by placing the brake drum partition to be spot welded at the end point of the lower second copper column 32, moving the mounting plate 11 on the upper side by the shell 1, moving the end point of the upper second copper column 32 downwards, the end point of the upper second copper column 32 contacts the brake drum partition to be welded, achieving the welding of the brake drum partition to be welded, the distance from the end point of the first copper column 31 to the mounting plate 11 is less than the distance from the end point of the second copper column 32 to the mounting plate 11, when the thickness or heat conduction between two pieces to be welded is different, by moving the second copper column 32, the end point of the second copper column 32 is in the same plane as the end point of the first copper column 31, then the second copper column 32 and the first copper column 31 in the same plane contact the brake drum partition to be welded with thicker thickness or better heat conduction capacity, by using an electrode with a larger end face diameter on the side of the thick plate or the side with good heat conduction capacity, the contact area is increased, the current density is reduced, and the heat production is reduced; by using an electrode with a smaller end face diameter on the side of the thin plate or the side with poor heat conduction capacity, the current is concentrated, the heat production is increased, and the heat distribution is achieved, the purpose is to make more heat flow to the thick plate, while protecting the thin plate from overheating, effectively avoiding the phenomenon that when the thickness difference between the two plates is large, the heat is mainly concentrated on the thick plate, causing the thin plate to be possibly burned through or the thick plate to be not fused.

[0040] AsFigures 1 to 9 As shown, the top of the second copper column 32 is fixedly connected with a rotating block 33, by pulling the rotating block 33, the rotating block 33 moves with the second copper column 32 to the direction of the mounting plate 11, the top of the first copper column 31 extends to the direction of the rotating block 33 to form a second extension block 311, the second extension block 311 is clamped into the inside of the rotating block 33, by the movement of the rotating block 33, the rotating block 33 is separated from the position of the second extension block 311, at this time the rotating block 33 can rotate, the rotation of the rotating block 33 is more convenient, the inside of the rotating block 33 is provided with a groove 331, and the rotation of the rotating block 33 can make the groove 331 rotate, and after the groove 331 rotates 90 degrees, the groove 331 is in the same horizontal plane with the second extension block 311, at this time the rotating block 33 is loosened, the bottom of the rotating block 33 is fixedly connected with a limiting disc 35, by moving the rotating block 33, the rotating block 33 can move with the limiting disc 35, the limiting disc 35 and the first copper column 31 are provided with a fourth spring 34 welded with the limiting disc 35, by the movement of the limiting disc 35, the movement of the limiting disc 35 can extrude the fourth spring 34, the fourth spring 34 is in a natural stretching state when the limiting disc 35 does not move, in the process of upward movement of the limiting disc 35, the limiting disc 35 extrudes the fourth spring 34, so that the fourth spring 34 changes from the natural stretching state to the tight state, the rotating block 33 can return to the original position under the action of the fourth spring 34, so that the device is more convenient to use, and the fourth spring 34 is only welded with the limiting disc 35, at this time the rotating block 33 is rotated, the rotating block 33 rotates with the limiting disc 35 and the fourth spring 34, the fourth spring 34 will not affect the rotation of the rotating block 33, the rotating block 33 returns to the original position under the action of the fourth spring 34, and the second extension block 311 abuts against the groove 331, so that the retraction of the first copper column 31 is blocked, at this time the rotating block 33 and the first copper column 31 are fixed, the first copper column 31 and the second copper column 32 can be kept in this state, so that the endpoints of the first copper column 31 and the second copper column 32 are in the same horizontal plane, it is more convenient to move the second copper column 32 and the endpoints of the first copper column 31 to be in the same horizontal plane, so that the device is more convenient to use, and the first copper column 31 and the second copper column 32 of the upper part or the first copper column 31 and the second copper column 32 of the lower part can be adjusted according to needs, so that welding between welding pieces of different weights is more convenient and labor-saving.

[0041] As Figures 1 to 9As shown, the opposite sides of the two mounting plates 11 are provided with cleaning mechanisms 2, the cleaning mechanisms 2 include driving rings 25 fixedly connected with the mounting plates 11, the inside of the driving rings 25 is fixedly connected with limiting columns 23, the side surface of the limiting columns 23 away from the driving rings 25 is screw transmission connected with limiting plates 22, the outer surface of the limiting plates 22 is rotationally connected with rotating plates 21, when the two mounting plates 11 move with the first copper columns 31 and the second copper columns 32, at this time the welding pieces press the rotating plates 21, and the rotating plates 21 are connected between the rotating plates 21 and the limiting plates 22, in the process of the rotating plates 21 moving upwards, the rotating plates 21 move upwards with the limiting plates 22, and the limiting plates 22 are screw transmission connected with the limiting columns 23, in the state that the limiting columns 23 and the driving rings 25 keep fixed with the mounting plates 11, the upward movement of the limiting plates 22 can make the limiting plates 22 rotate on the surface of the first springs 24, so that the rotation of the limiting plates 22 is more convenient, and the rotation of the limiting plates 22 can make the rotating plates 21 rotate, the bottom of the rotating plates 21 is fixedly connected with polishing blocks 26, at this time the polishing blocks 26 contact with the welding points of the welding pieces, the rotating polishing blocks 26 can polish the welding points of the welding pieces, the oil stains, rust marks, paints or plating layers on the surface of the welding pieces can seriously affect the contact resistance, leading to unstable welding quality, even splashing, and virtual welding, through the polishing blocks 26 polishing and cleaning the welding points of the welding pieces, the oil stains, rust marks, paints or plating layers on the surface of the welding pieces are removed, so that the welding effect is better, and the position polished by the polishing blocks 26 is the welding point, the polishing is more accurate, so that the device is more convenient to use, the first springs 24 are welded between the driving rings 25 and the limiting plates 22, the first springs 24 are in a natural stretching state when the limiting plates 22 do not move, after the limiting plates 22 move, the limiting plates 22 press the first springs 24, so that the first springs 24 change from the original natural stretching state to a tight state, which is convenient for the limiting plates 22 and the rotating plates 21 to return to the original position under the action of the first springs 24, so that the device is more convenient to use, a plurality of steel wires 28 are fixedly connected in the rotating plates 21, in the process of the rotating plates 21 rotating, the rotating plates 21 rotate with the steel wires 28, so that the rotation of the steel wires 28 is more convenient, and when the rotating plates 21 move upwards and rotate with the steel wires 28, the rotating steel wires 28 polish the end points of the first copper columns 31 and the second copper columns 32, the first copper columns 31 and the second copper columns 32 will gradually deform, wear and alloy under the repeated action of high temperature and high pressure, through the polishing of the steel wires 28 on the end points of the first copper columns 31 and the second copper columns 32, the deformation, wear and alloy of the first copper columns 31 and the second copper columns 32 are effectively prevented, so that the first copper columns 31 and the second copper columns 32 do not need to be frequently disassembled and polished, and the first copper columns 31 and the second copper columns 32 can be polished every time, so that the device is more convenient to use.

[0042] As Figures 1 to 9The grinding block 26 is connected with the rotating plate 21 through the rotating shaft and the torsion spring to form a reset mechanism, which is the prior art and will not be described here. The grinding block 26 is more closely attached to the surface of the welding part, and the grinding block 26 can rotate, so that the grinding block 26 can be attached to some special-shaped welding points. The device is suitable for grinding these special-shaped welding points, so that the device has a wider application range. The top of the limiting plate 22 extends to form a first extension block 211, and the top of the first extension block 211 extends upward to form a pressing block 212. During the rotation and upward movement of the rotating plate 21, the pressing block 212 moves upward and rotates with the rotating plate 21. The bottom of the driving ring 25 corresponds to the position of the pressing block 212 and is provided with a pressing groove 251. After the pressing block 212 moves upward to the inside of the pressing groove 251, the inclined surface of the pressing groove 251 presses the pressing block 212, so that the pressing block 212 is pressed and moves to the center of the driving ring 25. The movement of the pressing block 212 is more convenient, and the movement of the pressing block 212 brings the rotating plate 21 up. The rotating plate 21 moves the grinding block 26, so that the grinding block 26 moves away from the welding point, and the grinding block 26 is rotatably connected with the rotating plate 21, which effectively prevents the grinding block 26 from affecting the lifting of the rotating plate 21. After the rotating plate 21 is lifted, the brake drum partition plate polished by the first copper column 31 and the second copper column 32 is separated from the inside of the rotating plate 21, so that the brake drum partition plate polished by the first copper column 31 and the second copper column 32 is more convenient to clean, and the device is more convenient to use. At this time, the mounting plate 11 with the first copper column 31 and the second copper column 32 can contact the welding points of the welding part, so that the device is more convenient to use, and when not in use, the rotating plate 21 blocks the first copper column 31 and the second copper column 32 from the outside, so that the first copper column 31 and the second copper column 32 are better protected.

[0043] As Figures 1 to 9The inner surface of the rotating plate 21 is provided with a cleaning piece 27, the cleaning piece 27 comprises a gas storage column 272 fixedly connected with the rotating plate 21, the inside of the gas storage column 272 is slidably connected with an extrusion column 271, during the upward movement of the rotating plate 21 with the extrusion column 271, the extrusion column 271 is extruded by the limiting column 23, so that the extrusion column 271 moves in the inside of the gas storage column 272, the extrusion column 271 extrudes the air in the inside of the gas storage column 272, so that the inside of the gas storage column 272 presents a high pressure phenomenon, the inside bottom of the extrusion column 271 is fixedly connected with a first disc 274, the air in the inside of the gas storage column 272 is difficult to leave through the bottom of the gas storage column 272 through the block of the first disc 274, the top of the first disc 274 is welded with a second spring 273, during the movement of the extrusion column 271, the extrusion column 271 extrudes the second spring 273, so that the second spring 273 changes from the natural stretching state to the tight state, facilitating the extrusion column 271 to return to the original position, the inside of the first disc 274 is slidably connected with a connecting rod 275, during the downward movement of the extrusion column 271, the extrusion column 271 extrudes the connecting rod 275, so that the connecting rod 275 moves downward, the bottom of the connecting rod 275 is fixedly connected with a second disc 276, during the movement of the connecting rod 275, the connecting rod 275 moves downward with the second disc 276, the top of the second disc 276 is fixedly connected with a plurality of blocking columns 277 arranged in an annular array, the second disc 276 moves downward with the blocking columns 277, the blocking columns 277 penetrate through the first disc 274, after the second disc 276 moves downward with the blocking columns 277, the blocking columns 277 leave the inside of the first disc 274, at this time, the gas between the extrusion column 271 and the first disc 274 reaches the bottom of the gas storage column 272 after passing through the first disc 274, the gas leaves from the bottom of the gas storage column 272, the blocking columns 277 leave the inside of the first disc 274 at the same time as the rotation of the rotating plate 21, facilitating the gas in the gas storage column 272 to blow the polishing position of the polishing block 26, blow the material polished by the polishing block 26 and the material polished in the rotating plate 21 away from the polishing point, and the rotating plate 21 is lifted with the cleaning piece 27, so that the gas blows to the polishing edge, the cleaning effect of the polished material is better, the surface of the connecting rod 275 is sleeved with a third spring 278, during the movement of the connecting rod 275, the connecting rod 275 extrudes the third spring 278, so that the third spring 278 deforms, facilitating the connecting rod 275 to return to the original position under the action of the third spring 278, so that the device can be repeatedly used, and the use of the device is more convenient.

[0044] The above merely shows a preferred embodiment of the present application; however, the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes according to the technical solution and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A brake drum barrier spot welding device comprising a housing (1), characterized in that The front side of the shell (1) is fixedly connected with mounting plates (11) at the top and bottom, and the inside of the mounting plate (11) is provided with an adjusting mechanism (3); The adjusting mechanism (3) comprises a first copper column (31) fixedly connected with the mounting plate (11), and the inside of the first copper column (31) is slidably connected with a second copper column (32); The top of the second copper column (32) is fixedly connected with a rotating block (33), the top of the first copper column (31) extends in the direction of the rotating block (33) to form a second extension block (311), the second extension block (311) is clamped into the inside of the rotating block (33), and the inside of the rotating block (33) is provided with a groove (331); The bottom outer ring of the rotating block (33) is fixedly connected with a limiting disc (35), a fourth spring (34) is arranged between the limiting disc (35) and the first copper column (31) and welded with the limiting disc (35), the fourth spring (34) is in a natural stretching state when the limiting disc (35) does not move, the distance from the endpoint of the first copper column (31) to the mounting plate (11) is smaller than the distance from the endpoint of the second copper column (32) to the mounting plate (11) when the fourth spring (34) is in the natural stretching state, and the endpoints of the first copper column (31) and the second copper column (32) are in the same horizontal plane when the fourth spring (34) is in a tight state; The opposite sides of the two mounting plates (11) are provided with cleaning mechanisms (2), the cleaning mechanism (2) comprises a driving ring (25) fixedly connected with the mounting plate (11), and the inside of the driving ring (25) is fixedly connected with a limiting column (23); The side surface of the limiting column (23) away from the driving ring (25) is screw-connected with a limiting plate (22), the outer surface of the limiting plate (22) is rotatably connected with a rotating plate (21), and the bottom of the rotating plate (21) is fixedly connected with a polishing block (26); A first spring (24) is welded between the driving ring (25) and the limiting plate (22), and the first spring (24) is in a natural stretching state when the limiting plate (22) does not move; a plurality of steel wires (28) are fixedly connected in the inside of the rotating plate (21); The top middle part of the limiting plate (22) extends to form a first extension block (211), the top of the first extension block (211) extends upward to form a pressing block (212), and the bottom of the driving ring (25) is provided with a pressing groove (251) corresponding to the position of the pressing block (212).

2. A brake drum barrier spot welding device according to claim 1, characterised in that The inner surface of the rotating plate (21) is provided with a cleaning piece (27), and the cleaning piece (27) comprises a gas storage column (272) fixedly connected with the rotating plate (21), and the inside of the gas storage column (272) is slidably connected with a pressing column (271).

3. A brake drum barrier spot welding device according to claim 2, characterised in that The inside bottom of the pressing column (271) is fixedly connected with a first disc (274), the top of the first disc (274) is welded with a second spring (273), and the inside of the first disc (274) is slidably connected with a connecting rod (275).

4. A brake drum barrier spot welding device according to claim 3, characterised in that The bottom of the connecting rod (275) is fixedly connected with a second disc (276), the top of the second disc (276) is fixedly connected with a ring-shaped array distributed blocking column (277), the blocking column (277) penetrates the first disc (274), and the surface of the connecting rod (275) is sleeved with a third spring (278).

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